After taking some time to dig into the All-22 Coaches Film to study how the Packers plan to use Lacy and a more power-oriented running game, here are three reasons why I'm convinced this will pay huge dividends for Green Bay this fall:

The Packers have routinely fielded potent offenses in the past few seasons, but the unit has lost some of the toughness and physicality that made it a well-rounded group when Ryan Grant was in his prime. As Green Bay's feature back in 2008 and '09, Grant posted back-to-back 1,200-yard seasons. He was a hard-nosed inside runner with deceptive speed, strength and power. Most importantly, he handled a heavy workload (312 carries in 2008 and 282 in '09). Grant could grind out tough yards between the tackles, meaning the Packers could turn to a power-based ground attack when opponents made a concerted effort to neutralize all-everything quarterback Aaron Rodgers and the passing game.

In Lacy, the Packers have a big, physical runner with a rough-and-rugged game. Checking in at 5-foot-11 and 230 pounds, he is a punishing inside runner adept at running through contact in the hole. He frequently blew through defenders on inside runs throughout the preseason, continuing a trend that saw him average 7.6 yards per attempt on inside runs during his final season at Alabama. Additionally, Lacy runs effectively from one- and two-back formations, which makes it possible to keep him on the field in various packages, including "11" (1 RB, 1 TE, 3 WR) and "12" (1 RB, 2 TE, 2 WR) personnel groupings. This is an important development for the Packers' offense, because it allows head coach Mike McCarthy to feature a power-based running game from the same spread formations Rodgers uses to pick apart opponents with pinpoint passes.

I looked at some of the Packers' offensive snaps from the preseason, and I believe McCarthy has already given the NFL a glimpse at how Lacy could help the unit this fall.

In the following screengrab, taken from the Packers' preseason matchup against the St. Louis Rams, Green Bay breaks the huddle in an ace formation with Lacy at tailback. Rodgers will count the number of defenders in the box and make a decision to run or pass:

With just seven defenders in the box, Rodgers calls an outside zone to the right side of the defense. Lacy will simply read the block of the tight end and react to the flow of the defense:

Thanks in large part to a nifty spin move, Lacy is able to rumble through the middle of the defense for a 7-yard gain.

In the screengrab below, the Packers break the huddle in a dubs formation with Lacy in the backfield. Rodgers will decide whether to run or throw based on the alignment of the weak-side linebacker. Additionally, he will look at the alignment of the defensive end to determine the vulnerable area of the defense:

With the tight end capable of reaching the defensive end, the Packers run an outside zone play to the boundary:

The tight end eventually climbs to the second level to lock on to the strong-side 'backer, which allows Lacy to get to the corner:

Lacy blows through several would-be tacklers, piling up another 15 yards.

2) Lacy's presence reintroduces the long ball to Green Bay's game plan.

Part of the impetus behind developing an improved running game in 2013 is finding a better way to keep Rodgers upright in the pocket. Last season, the Packers surrendered 51 sacks (second-most in the NFL) and subjected the 2011 NFL MVP to several big hits in the pocket. The constant harassment forced McCarthy to tweak his game plan to feature fewer five- and seven-step drops, which greatly reduced the number of vertical throws in the Packers' playbook. Consequently, Rodgers' passes of 20-plus yards (54 in 2012, down from 64 in '11) and 40-plus yards (nine in 2012, down from 13 in '11) declined significantly last season. These totals also represent a tremendous drop-off from Rodgers' deep-ball production in 2008 and '09, when he tallied 16 and 17 passes of 40-plus yards, respectively.

With a Lacy-led power running game in place, though, the Packers can force opponents to abandon some of the exotic pressures that have tormented the offensive line in recent years. Due to concerns about gap integrity at the line of scrimmage, opposing defensive coordinators won't be able to utilize some of the twists, stunts and blitzes that are effective in obvious passing situations. Quick-hitting running plays exploit such tactics by allowing the runners to hit the hole before defenders are able to get into the gaps. Therefore, opponents will rely on conventional pass-rush tactics, which feature more straightforward rushes, with possibly one or two linebackers inserted in the pursuit. As a result, the offensive line is better able to identify potential blitzes and properly secure the edges.

The threat of an effective running game also will change the coverage Rodgers faces in the back end. With a power runner like Lacy in the backfield, defensive coordinators won't be able to lean on umbrella coverage. Play callers will look to outnumber the Packers at the point of attack, featuring more eight-man fronts against two-back formations and seven-man looks against one-back sets. These tactics will force opponents into more single-high safety looks with one-on-one coverage on the perimeter, giving explosive playmakers like Jordy Nelson and Randall Cobb more opportunities to win on downfield routes.

3) Aaron Rodgers will become an even more efficient passer.

It's hard to imagine Rodgers playing better at the position, but his game could go to another level with Lacy thriving in the backfield. The threat of defending a big-time running back forces linebackers and defensive backs to play honest at the point of attack, which makes play action more effective in the passing game. Factor in more defenders near the line of scrimmage as part of a loaded box (eight-man front), and Rodgers should have bigger passing windows to target, particularly on early downs.

Studying the Packers' offense throughout the preseason, I've seen more play-action passes with complementary routes over the middle of the field. These routes are specifically designed to take advantage of overaggressive linebackers reacting quickly to the threat of Lacy receiving an inside handoff.

In the screengrab below, also taken from the Packers' preseason game against the Rams, the offense is aligned in an open offset I-formation with Lacy in the backfield and tight end Jermichael Finley aligned in the slot. The presence of Lacy will attract the attention of the Rams' linebackers:

After the snap, Rodgers fakes the ball to Lacy, which lures Alec Ogletree to the line of scrimmage and creates a void in the middle for Finley on a dig route:

The next two screengrabs look at another noteworthy play from the Rams game. The Packers align in a trips formation with Lacy in the backfield. Rodgers executes an inside-handoff fake while Finley runs a lazy slant over the middle:

With the linebacker and nickel corner overreacting to the run, Rodgers targets Finley on another easy pitch-and-catch:

Finley takes the short pass and sprints down the field for a 33-yard gain.